Apparently, this user prefers to keep an air of mystery about them.
5 What shape is this? Mar 15 '11
3 Identity for a product of choose functions Nov 7 '13
2 What is the least upper bound on the number of pairs of disjoint subsets of a binary step-order set S whose sums differ by 1? Sep 17 '10
2 Convex hull of a triangle and a translation of it May 23 '12